- •Acknowledgment
- •Abbreviations and Glossary
- •Contents
- •Introduction
- •1: Should You Become a VR Surgeon?
- •2.2 A Word of Caution
- •Introduction
- •3: Fundamental Rules for the VR Surgeon
- •3.4 The “What, When, How – and Why” Questions
- •3.5 Don’t Start What You Cannot Finish
- •3.6 Common Sense vs Dogma
- •3.7 Maximal Concentration During the Entire Operation
- •3.8 Make Life as Easy for Yourself as Possible
- •3.9 Under Peer Pressure: To Yield or Not to Yield
- •3.10 Referral of the Patient
- •3.11 The Rest of the Eyeball…
- •4.1 What If the Surgeon Has Tremor?
- •4.2 How Important Is Good Dexterity?
- •4.5 Combined Surgery or Cataract Surgery Separately?
- •4.7 How Much Confidence in Himself Should the VR Surgeon Have?
- •4.8 How Long Do Vitrectomies Take?
- •4.9 Was Surgery Successful?
- •5.1 The “Target” of Counseling
- •5.2 The Patient Does Not Know Most of What Is so Obvious to the Surgeon
- •5.3 Communicating with the Patient
- •5.4 Coaching vs Trying to Be Objective
- •5.5 The Ultimate Treatment Decision: “Whose Eye Is It?”
- •5.6 Which of the Two Eyes to Operate on First?
- •5.7 What if the Eye Has Two Diseases?
- •5.8 What if the Eye Has Severe Visual Loss and the Chance of Improvement with Another Surgery Is Low?
- •5.9 Empathy: The Single Most Important Component of Counseling
- •5.10 The Prognosis with the Chosen Surgical Option
- •5.11 If the Patient Chooses to Undergo Surgery
- •5.12 The Benefits of Proper Counseling
- •5.14 The Dogmas
- •6: The VR Surgeon’s Relation to His Nurse
- •7: Examination
- •8: The Indication Whether to Operate
- •8.1 The Argument in Favor of Surgery
- •8.3 The Age of the Patient
- •8.4 The Condition of the Fellow Eye
- •11: The Surgeon’s Relation to Himself
- •11.3 Self-Examination
- •Introduction
- •12.1.1 The Pump
- •12.1.1.1 Peristaltic Pump: Flow Control
- •12.1.2 The Probe
- •12.1.2.2 Port Location
- •12.1.2.3 Port Configuration and Size
- •12.1.2.4 Cut Rate
- •12.1.2.6 Probe Length
- •12.1.3 The Light Source/Pipe
- •12.1.4 The Infusion Supply
- •12.1.5 The Trocar
- •12.1.6 The Cannula
- •12.1.7 System to Inject/Extract Viscous Fluid
- •12.1.8 The Pedal
- •12.1.10 Endodiathermy Probe
- •12.1.11 The User Interface of the Vitrectomy Console
- •12.1.12 Troubleshooting
- •12.2 The Microscope
- •13: Instruments, Tools, and Their Use
- •13.2.1.1 General Concepts of Working with Squeezable Instruments
- •13.2.1.2 The Handle
- •13.2.1.3 Forceps
- •13.2.1.4 Scissors
- •13.2.2 Hybrid Instruments
- •13.2.2.2 Retractable Instruments
- •13.2.3 Non-squeezable Hand Instruments
- •13.2.3.1 Bent (Hooked, Barbed) Needle
- •13.2.3.2 Membrane Scraper
- •13.2.3.3 Spatula/Pic
- •13.2.3.4 Intraocular Magnet
- •13.3.1 Membrane Dissection (“Viscosurgery”): Viscoelastics as a Spatula
- •13.3.2 Opening a Closed Funnel
- •14: Materials and Their Use
- •14.2 Intravitreal Gas
- •14.3 Silicone Oil
- •14.3.1 Types of Silicone Oil
- •14.3.3 Complications Related to Silicone Oil Use
- •14.3.4 Complications Related to Silicone Oil Use Removal
- •14.4 PFCL
- •14.6 Sutures
- •15: Anesthesia
- •15.1 How to Decide the Type of Anesthesia
- •15.2 If Local Anesthesia Is Chosen
- •15.3 Medications If Local Anesthesia Is Used
- •16: The Surgeon at the Operating Table
- •16.1 The OR Personnel
- •16.2 The Operating Table and the Surgeon’s Chair
- •16.2.1 The Operating Table
- •16.2.2 The Surgeon’s Chair
- •16.4 The Microscope
- •16.5 The BIOM
- •16.5.1 BIOM: The Advantages
- •16.5.2 BIOM Use: Practical Information
- •16.5.3 BIOM: Setting Up for Daily Use
- •16.5.4 BIOM: Checklist
- •16.5.5 BIOM: Troubleshooting
- •16.6 The Patient
- •16.7 The Surgeon
- •16.7.2 At the Start of Vitrectomy
- •16.7.3 Staring into the Microscope
- •16.8 Music in the OR
- •16.9 The Brightness in the OR
- •16.10 The Quality of the Air in the OR
- •16.12 The Blueprint of the OR
- •16.13 The Captain in the OR
- •16.14 The Fundamental Technical Rules of Performing Intravitreal Surgery
- •Introduction
- •17.3 The Endoscope Approach (EAV)
- •17.4 Portable Systems
- •17.5 3D Viewing
- •18.1 Disinfection and Draping
- •18.2 The Monocular Patient
- •18.3 At the Conclusion of the Operation
- •19: The Speculum and Its Placement
- •19.1 General Considerations
- •19.2 Speculum Placement
- •20.3 Injecting into the Vitreous Cavity During Surgery
- •21: Sclerotomies and the Cannulas
- •21.2 Location of the Sclerotomies
- •21.2.1 Distance from the Limbus
- •21.2.2 Location in Clock Hours
- •21.2.3 In Case of a Reoperation
- •21.2.4 In Case of Scleral Thinning
- •21.3 Inserting the Cannula
- •21.4 The Order of Cannula Placement
- •21.5 If the Palpebral Opening Is Small
- •21.6 Checking the (Infusion) Cannula
- •21.6.1 Cannula Under the Choroid/Retina: Prevention
- •21.6.2 Cannula Under the Choroid/Retina: Management
- •21.6.3 Infusion Going Under the Choroid/Retina: Management
- •21.7 The Cannulas in Use
- •21.8 The Removal of the Cannulas
- •21.8.1 Hypotony: The Causes
- •21.8.2 Hypotony: The Consequences
- •21.8.3 Hypotony: Prevention
- •21.8.4 Hypotony: Postoperative Management
- •22: Illumination
- •22.1 The Light Pipe
- •22.3 Light Built into the Handheld Instruments
- •24: Using the Vitrectomy Probe
- •24.1 Removal of the Vitreous
- •24.2 Removal of Proliferative Membranes
- •24.3 Removal of the Retina
- •24.4 Removal of the Lens
- •25: Maintaining Good Visualization
- •25.1.1 The Microscope
- •25.1.2 The Contact Lens
- •25.1.3 The Corneal Surface
- •25.1.4 The Corneal Stroma
- •25.2 Internal Factors
- •25.2.2 Pupil
- •25.2.2.1 Mechanical Forces Preventing Pupil Dilation
- •25.2.2.2 Intracameral Adrenalin or Visco
- •25.2.2.4 Iris Ring
- •25.2.2.5 Iridotomy
- •25.2.3 Lens
- •25.2.3.1 Cataract
- •25.2.3.2 “Feathering”
- •25.2.3.3 “Gas Cataract”
- •25.2.3.4 “Lens Touch”
- •25.2.4.1 Phimosis of the Anterior Capsule
- •25.2.4.2 Deposit on the Anterior IOL Surface
- •25.2.4.3 Problems with the IOL Itself
- •25.2.4.4 Fluid Condensation
- •25.2.5 The Posterior Capsule
- •25.2.6 The Vitreous Cavity
- •25.2.7 Epiretinal (Subhyaloidal) Materials
- •25.2.7.1 Blood
- •25.2.8 The Surgeon’s Actions
- •25.2.9 “Chromovitrectomy”
- •26.1.1 Vitreous Macroanatomy
- •26.1.2 Vitreous Biochemistry and Its Anatomical and Functional Implications
- •26.1.3 Retinal Histology and Macroanatomy
- •26.1.4 Anterior Segment Dimensions
- •26.2 External Anatomy for the VR Surgeon
- •26.3 Physiology: What Keeps the Retina Attached?
- •26.3.1 The RPE Pump
- •26.3.3 Presence of the Vitreous Gel
- •27: The Basics of Vitreous Removal
- •27.1 The Rationale for PPV
- •27.2 How Much Vitreous to Remove?
- •27.3 Recognizing the Presence of the Vitreous Gel
- •27.3.1 Mechanical Aids
- •27.3.2 Air (Pneumovitrectomy)
- •27.3.3 Stains and Markers
- •27.4 The Sequence of Vitreous Removal
- •27.5.2 Vitrectomy Anterior to the Equator
- •27.5.3 Vitrectomy Behind the Lens
- •28: Scleral Indentation
- •28.1 The Advantages of Scleral Indentation
- •28.2 The Mechanics of Vitrectomy with Scleral Indentation
- •28.3 Internal vs External Illumination
- •28.5 External Illumination and Nurse Indentation
- •28.6 Instrumentation and Technique
- •29: Cryopexy
- •29.1 Indication in RD
- •29.2 Surgical Technique
- •29.3 Cryopexy as a Destructive Force
- •30: Endolaser
- •30.1 The Consequences of Laser Treatment
- •30.2 The Setup
- •30.3 The Technique of Endolaser Treatment
- •30.3.1 General Considerations
- •30.3.2 Panretinal Treatment
- •30.3.3 Endolaser Cerclage and Its Complications
- •30.3.4 Endolaser as a Walling-Off (Barricading) Tool
- •30.3.5 Endolaser as a Welding Tool
- •30.4 Peripheral Laser and the Beginner VR Surgeon
- •30.5 Endocyclophotocoagulation
- •30.6 Laser Cerclage at the Slit Lamp
- •31: Working With and Under Air
- •31.1.1 Attached Retina
- •31.3 The Utilization of an Air Bubble
- •32: Working with Membranes
- •32.1.1 Instrumentation and Infrastructure
- •32.1.2 Opening the ILM
- •32.1.2.1 Sharp Opening: Incision First
- •32.1.2.2 Blunt Opening: No Incision
- •The Scraper
- •32.1.3 Peeling the Membrane
- •32.1.4 The Extent of ILM Peeling
- •32.1.5 What If the ILM Cannot Be Peeled?
- •32.1.6 ILM Removal in Eyes with Detached Macula
- •32.1.6.1 Reattaching the Macula First
- •32.1.6.2 Peeling When the Macula Is Still Detached
- •32.2.2 Removal Technique
- •32.2.2.1 Staining or Not?
- •32.2.2.2 Instrumentation
- •32.2.2.3 Location of the Point of Attack
- •32.2.2.4 The Major Risks When First Grabbing an EMP
- •32.2.2.5 The Direction of Peeling: Centripetal vs Centrifugal
- •32.2.2.6 The Speed of Peeling
- •32.2.2.7 The Extent of Peeling
- •32.2.2.8 ILM Peeling
- •32.2.2.9 Completion of Surgery
- •32.3.1.1 Recognition
- •32.3.1.2 The Goals of Surgery
- •32.3.1.3 Instrumentation
- •32.3.1.4 Surgical Steps
- •32.3.1.5 Closed Funnel/Retinal Incarceration
- •32.3.1.6 ILM Removal
- •32.4 Subretinal Membranes/Strands
- •33.1 Retinectomy
- •34: Chromovitrectomy
- •34.1 Posterior Vitreous Cortex
- •34.3.1 False-Positive Staining with ICG
- •34.3.2 Injection Technique for Staining the ILM
- •34.4 Newly Formed (PVR) Membranes
- •35: Tamponades
- •35.2 Gases
- •35.2.1 General Considerations
- •35.2.3 Gas Injection into the Nonvitrectomized Eye
- •35.2.4 The Eye with Gaseous Tamponade
- •35.3.1 Indications to Use Heavier-Than-Water Liquids
- •35.3.2 Surgical Technique
- •35.3.2.1 Implantation
- •35.4 Silicone Oil
- •35.4.1 Selecting the Type of Silicone Oil to Implant
- •35.4.2 General Considerations
- •35.4.3 Indications
- •35.4.3.1 Semipermanent Tamponade
- •35.4.3.2 Permanent Tamponade
- •35.4.4 Implantation
- •35.4.5 With Silicone Oil in the Eye
- •35.4.5.1 General Considerations
- •35.4.5.2 Emulsification
- •35.4.6 Removal
- •35.4.6.1 Timing
- •35.4.6.2 Surgical Technique
- •35.5 Exchanges
- •35.6 If the Eye Is Aphakic
- •36: Submacular Hemorrhage
- •36.1 The Nonsurgical Approach: Intravitreal Gas and tPA
- •36.2 Removal of the Clot In Toto
- •36.4 The Minimalistic Surgical Approach
- •37: Subretinal Biopsy
- •38: Combined Surgery
- •38.1 Phacoemulsification
- •38.2 Lensectomy
- •38.2.1 Lens In Situ
- •38.3.1 Lens In Situ
- •38.3.2 Lens in Vitreous
- •38.4.2 No IOL Implantation
- •38.5 Capsule Removal
- •38.5.1 Indications
- •38.5.2 Surgical Technique
- •38.6.1 Advantages
- •38.6.2 Surgical Technique
- •38.6.3 Subsequent Sub/luxation of an Iris-Claw IOL
- •38.6.3.1 Subluxated Lens
- •38.6.3.2 Luxated Lens
- •39: AC Basics
- •39.1 Paracentesis
- •39.2 Iris Prolapse
- •39.3 Anterior Synechia
- •39.5 Material in the AC
- •40.2 Retinal Tear
- •40.3 Reopening of a Posterior Scleral Wound
- •40.4 Lens/IOL Trauma
- •41: Pediatric Patients
- •42: The Highly Myopic Eye
- •42.1 The Risk of RD If Cataract Surgery Is Needed
- •42.2 Vitrectomy in the Highly Myopic Eye
- •42.3 Posterior RD over a Staphyloma
- •43: Intravitreal Injections
- •Introduction
- •44: Dropped Nucleus and Dislocated IOL
- •44.1 General Considerations
- •44.1.2 Dislocated IOL
- •44.2 Surgical Technique
- •44.2.1 Dropped Nucleus
- •45: Endophthalmitis
- •45.1 General Considerations
- •45.1.1 Etiology
- •45.1.2 Clinical Diagnosis
- •45.1.3 Timing
- •45.1.4 Treatment Options and Management Philosophy
- •45.2 Surgical Technique
- •45.3 Posttraumatic Endophthalmitis
- •46: Floaters
- •46.1 General Considerations
- •46.1.1 Indication for Surgery
- •46.1.2 Timing of Surgery
- •46.2 Surgical Technique
- •47: Hyphema
- •47.1 General Considerations
- •47.1.1 The Rationale for Surgical Removal
- •47.1.2 Medical Treatment
- •47.2 Surgical Technique
- •47.2.1 Liquid Blood
- •47.2.1.1 Monomanual Technique
- •47.2.1.2 Bimanual Technique
- •47.2.2 Clotted Blood
- •48: Iris Abnormalities
- •48.1 General Considerations
- •48.1.2 Timing of Iris Reconstruction
- •48.2 Surgical Technique
- •48.2.2 Iridodialysis
- •48.2.3 Permanent Mydriasis
- •49: Macular Disorders: Edema
- •49.1 General Considerations
- •49.1.1 Etiology
- •49.1.2 Indications for Treatment: Surgical or Nonsurgical?
- •50.1 General Considerations
- •50.1.1 VMTS
- •50.1.2 Cellophane Maculopathy
- •50.1.3 Macular Pucker
- •50.1.4 Macular Hole
- •50.2.1 VMTS
- •50.2.2 Cellophane Maculopathy
- •50.2.3 Macular Pucker
- •50.2.4 Macular Hole
- •50.2.5 If Surgery Failed for a Macular Hole
- •51: Optic Pit
- •51.1 General Considerations
- •51.2 Surgical Technique
- •52.1 General Considerations
- •52.1.1 Indications
- •52.1.2 Preoperative Considerations
- •52.2 Surgical Technique
- •53.1 General Considerations
- •53.2 Surgical Technique
- •54: Retinal Detachment
- •54.1.1 RD Due to a Horseshoe or Giant Tear
- •54.1.2 RD Due to a Dialysis
- •54.1.3 RD Due to a Round Hole
- •54.1.4 RD Due to a Staphyloma
- •54.2 Additional Information About RD
- •54.2.1 History
- •54.2.3 Clinical Course
- •54.2.4 Using Laser to Prevent RD Development
- •54.2.4.1 Prophylaxis in the Affected Eye (RD, Current or Past)
- •54.2.4.2 Prophylaxis in the Fellow Eye
- •54.2.4.3 The Patient with a History of a Retinal Tear (No RD)
- •54.3 Treatment Principles
- •54.3.2 The Goals of Surgery
- •54.3.3 Prognosis
- •54.4.1 Preoperatively
- •54.4.2.1 Initial Steps
- •54.4.2.2 Creating a Chorioretinal Adhesion
- •54.4.2.3 Drainage of the Subretinal Fluid
- •54.4.2.5 Suturing
- •54.4.2.7 Adjusting the Buckle
- •54.4.2.8 Closing the Conjunctiva
- •54.4.2.9 Gas Tamponade
- •54.4.3 Major Intraoperative Complications of SB
- •54.5 Vitrectomy
- •54.5.2.3 Intraoperative Retinal Reattachment
- •54.5.2.4 Laser Retinopexy
- •54.5.2.5 Intraocular Tamponade
- •54.5.2.6 Postoperative Positioning
- •54.5.3 Follow-Up Visits
- •54.5.4 Prognosis
- •54.5.5 RD After Silicone Oil Removal
- •54.6 Pneumatic Retinopexy
- •54.6.1 General Considerations
- •54.6.2 Patient Selection
- •54.6.3 Surgical Options
- •54.6.3.1 Cryopexy, Followed by Gas Injection
- •54.6.3.2 Gas Injection, Followed by Laser
- •54.7 Reoperation
- •55: RD, Tractional and Combined
- •55.1.1 Characteristics of the RD
- •55.1.2 Management Principles
- •56: RD, Central
- •56.1 General Considerations
- •56.2 Surgical Technique
- •57: Retinoschisis
- •57.1.1 Anatomy and Pathophysiology
- •57.1.2 Prophylactic Laser Treatment
- •57.2 Surgical Technique
- •58.1 General Considerations
- •58.1.1 Treatment Options
- •58.1.2 The Vitrectomy Option
- •58.2 Surgical Technique
- •59: Scleroplasty
- •59.1 General Considerations
- •59.2 Surgical Technique
- •60: Suprachoroidal Hemorrhage
- •60.1.1 Indications for Surgery
- •60.1.2 Timing of Surgery
- •60.2 Surgical Technique
- •61: Uveitis, Posterior
- •62: Vitreous Hemorrhage
- •62.1 General Considerations
- •62.2 Surgical Technique
- •62.3 Severe Bleeding in a Young Patient
- •62.4 Rebleeding in a Vitrectomized Eye
- •63: Trauma
- •63.1 The Timing of Surgery
- •63.2 Contusion
- •63.3 Wound Toilette
- •63.5 Suturing the Sclera
- •63.6 Subluxated Lens
- •63.7 IOFB
- •63.7.2 Posterior Segment
- •63.8 Perforating Trauma and Ruptures
- •63.9 NLP and Sympathetic Ophthalmia
- •63.11 Hemorrhagic RD
- •63.12 Additional Considerations
- •64: Postoperative Care
- •Further Reading
- •Appendix
- •Part 2. Important Personal Experiences
536 |
63 Trauma |
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Pearl
Performing maneuvers in the anterior segment is technically much easier in an open-sky manner, but the risk of a major hemorrhage (ECH) is great. Should such a bleeding occur, the eye is probably lost (see Fig. 63.10).
Fig. 63.10 ECH in an eye undergoing a PK. There is prolapse of the vitreous and extensive and ever-increasing breakthrough bleeding from the choroid; this will rapidly be followed by expulsion of the retina. The hemorrhage occurred during extensive open-sky maneuvers. The chances of restoring vision or even preserving the eyeball at this point are very close to zero. The only way to avoid this scenario is to immediately close they eye when the vitreous prolapses
¥The donor cornea should be at least ½ mm greater than the size of the trephination: it is important to make the AC deep.
ÐUsing full-thickness sutures (see above, Sect. 63.4) helps keep the graft clear.
¥Silicone oil should be implanted at the end of the procedure.
ÐThe full-thickness sutures allow the F-A-X to be performed safely, under proper visual control. Since oil will be used, the BSS must completely be drained.
¥Even in a severely traumatized eye, the graft has an over 90% chance of survival.
63.11 Hemorrhagic RD
The principles and surgical technique do not differ from those described in Chap. 36, although in an injured eye, paradoxically, it may be easier to access the blood because of the existing retinal injuries (see Fig. 36.1).
63.12 Additional Considerations |
537 |
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63.12 Additional Considerations
Only a few general comments are made here.
Q&A
QCan primary IOL implantation be performed in an eye with posterior segment injury?
AYes Ð if the risk of PVR is low (and the biometry could safely and reliably be done). Conversely, there is rarely a need to implant that urgently. Remember, the ciliary body and the posterior retina determine the visual outcome, not the presence (or absence) of the IOL (see below).
¥It is not only the vitrectomy that needs to be truly complete in trauma, but the ciliary body must also be thoroughly cleansed (see Sect. 32.5).
Ð One of the most commonly seen errors in VR surgery for a severely injured eye is the attempt to preserve the posterior capsule so that Òin-the-bag IOL implantationÓ will remain an option in the future.17
¥Silicone oil implantation, even if considered as prophylactic when no major VR pathology is seen at the time of the vitrectomy, should be the default option.18 Ð The oil should be kept in these eyes for longer than in most other indications
(see Sect. 35.4.6.1).
Quo Vadis, Medicina?
Sadly, many experienced VR surgeons abandon the Þeld of traumatology, leaving the management of these complex, difÞcult cases to the least experienced, often ill-trained, surgeon. It is obviously devastating for the patient who thus faces a worse prognosis. It is also terrible for the fellow, whose surgical efforts are doomed, even if this is not his fault. As mentioned in Chaps. 1 and 2, such failures have a doubly devastating impact: the fellow will not learn how to properly deal with injured eyes, and his conÞdence also suffers repeated blows.
17The same ideology is employed by the phacologist who in an eye with severe endophthalmitis argues against the removal of the capsule and the implanted IOL (see Part 2 in the Appendix).
18ÒDefaultÓ is deÞned as the choice unless strong arguments can be made against it.
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63 Trauma |
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¥Being able to successfully operate on complex trauma cases is a very rewarding experience, compensating for those cases where success has proved elusive.
¥At an institution where multiple VR surgeons work, a few should specialize in ocular traumatology and do most of the cases. If all surgeons do a few cases each, the outcomes will be suboptimal.
¥Among all subÞelds in VR surgery, traumatology is where the surgeon can be most innovative since very few absolute rules exist.
¥If the VR surgeon Ð or any ophthalmologist Ð is unable or unwilling to offer the proper treatment to the patient with an injury, the only acceptable option is to immediately refer the patient to a VR surgeon who is willing and able to do what is necessary (see Sect. 3.10).
ÐDelaying the referral is also unacceptable: it should be the VR surgeon who makes the decision regarding timing, not the referring ophthalmologist.
- #28.03.202639.38 Mб0The Wills eye manual office and emergency room diagnosis and treatment of eye disease Adam T. Gerstenblith, Michael P. Rabinowitz.chm
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- #28.03.202614.01 Кб0[Офтальмология] Jack J. Kanski Джек Дж. Кански - Клиническая офтальмология систематизированный подход [2006, PDF DjVu, RUS] [rutracker-5395873].torrent
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